update-ca-bundle: really avoid failure on missing directory

While no problem was observed while XAPI launches this script, and
there is little reason to launch it while the certs dir does not exist
(except maybe for testing purposes), there is existing logic to create
/etc/stunnel, which when needed will still let `find` fail for lack of
/etc/stunnel/certs.

Signed-off-by: Yann Dirson <[email protected]>

scripts/update-ca-bundle.sh

@@ -5,6 +5,6 @@
 
 set -e
 
-mkdir -p /etc/stunnel
+mkdir -p /etc/stunnel/certs
 find /etc/stunnel/certs -name '*.pem' | xargs cat > /etc/stunnel/xapi-stunnel-ca-bundle.pem.tmp
 mv /etc/stunnel/xapi-stunnel-ca-bundle.pem.tmp /etc/stunnel/xapi-stunnel-ca-bundle.pem